Synthesis, Crystal Structures and Photoluminescence Properties of Two 2D Coordination Polymer Compounds with Drug Ligand Enoxacin

• Published in: Chinese journal of chemistry Vol. 24; no. 7; pp. 899 - 902
• Main Authors: Yu, Liang-Cai, Chen, Zhen-Feng, Tan, Ming-Xiong, Liang, Hong, Zhou, Chun-Shan, Zhang, Yong
• Format: Journal Article
• Language: English
• Published: Weinheim WILEY-VCH Verlag 01.07.2006; WILEY‐VCH Verlag
• Subjects: cobalt(II); coordination polymer; crystal structure; enoxacin; hydrothermal synthesis; photoluminescence; zinc(II)
• ISSN: 1001-604X; 1614-7065
• DOI: 10.1002/cjoc.200690171

Two new 2D coordination polymers of [M(Enox)2]·C2H5OH (MZn, 1 and Co, 2; HEnox=1,4‐dihydro‐ 1‐ethyl‐6‐fluoro‐4‐oxo‐7‐piperazine‐1,8‐naphtyridine‐3‐carboxylic acid) were synthesized under hydrothermal conditions. The single crystal X‐ray diffraction analyses showed that 1 and 2 are isostructural. The Zn(II) in 1 and Co(II) ions in 2 are six‐coordinated in an octahedral environment with an equatorial plane composed of four oxygen atoms:two of them from the 4‐oxo and the other two from 3‐carboxylate of two coordinated Enox ligands, forming a stable six‐membered chelating ring with the apical positions occupied by two N atoms of the piperazinyl rings. Thus, the molecules were self‐assembled into a 2D neutral square grid with cavity dimensions of 1.3399 nm×1.3399 nm for 1 and 1.3389 nm×1.3389 nm for 2, respectively. Compound 1 emits strong blue fluorescence on irradiation by UV light in the solid state at room temperature.